Interview pattern programming logical question, pascal triangle, pyramid, right angle.

Please Note: Python Language is more resrict about white spaces and indentation, so check it before running this given code below.

 

1. Draw a pattern programe of full pyramid triangle in python using function and class.

 
n=int(input())

class Fun:
    def fun1(self):
        for i in range(n):
            for j in range(n*3-i-1):
                print(" ", end="")


            for j  in range(i*2+1):
                print("*", end="")
            print("")

        c=n
        for i in  range (n):
            c-=1
            for j in range(n*2):
                print(" ", end="")
        
            for j in range(i):
                print(" ",end="")
            for j in  range(c*2+1,0,-1 ):
                print("*", end="")

            
            print("")



object1=Fun()            
object1.fun1()







            

 2.1 Draw a right angle triange with joining reverse right angle triange in python using private function calling.

2.2 Find the factorial of n number using private method.

 



class Fun:
    def __fun2(self,n=5):
        
        for i in range(n):
            for j in range(i):
                print("*", end="")
            print("")    
        for i in range(n):
            n-=1
            for j in range(n,0,-1):
                print("*", end="")
            print("") 
    def __factorial(self , n):
        # return 1 if (n==0 or n==1) else self.__factorial(n-1)*n
        if n==0 or n==1:
            return 1
        else:
            return self.__factorial(n-1)*n 

    def calling_factorial(self, n):
        return self.__factorial(n)        

    def design_pyramid(self, t):
            return self.__fun2(t)

object2=Fun()
object2.design_pyramid(n)
print("Factorial of {} is {}".format( n, object2.calling_factorial(n)))

3. Draw a right angle triangle in python using Constructor

 

#this programe is implemented through the concept of constructor in python .
n=int(input())


class Fun3 ():
    def __init__(self):
        for i in range(n):
            for j in range(n-i-1):
                print(" ", end="")

            for i  in range(i+1):
                print("*", end="") 
            print("")    
      
      
object3= Fun3()





  

4.1 Design a pattern of Pascal Triangle in python using Abstract class and functions.

4.2 Design a pyramid with joining reverse pyramid in python.

 


# Print Pascal's Triangle in Python

from abc import ABC,abstractmethod
from math import factorial
n=int(input())


class Pascal(ABC):
    @abstractmethod
    def pascal_triangle(self):pass

class Fun4( Pascal ):
    def pascal_triangle(self):
        for i in range(n):
            
            for j in range(n-i+1):

                # for left spacing
                print(" ", end="  ")

            for j in range(i+1):

                # nCr = n!/((n-r)!*r!)
                print(factorial(i)//(factorial(j)*factorial(i-j)), end="      ")

            # for new line
            print()

    def inverse_pyramid(self):

        c=n
        for i in  range (n):

            c-=1
            for j in range(n*2):
                
                print(" ", end="")
        
            for j in range(i):
                print(" ",end="")
            for j in  range(c*2+1,0,-1 ):
                print("*", end="")
            
            print("")
        for i in range(n):
            for j in range(n*3-i-1):
                print(" ", end="")

            for j  in range(i*2+1):
                print("*", end="")
            print("")
    def t(): 
        pass       

 


f4=Fun4()
f4.pascal_triangle()
f4.inverse_pyramid()